Roofing



May 27, 1930. c; E. RAHR 1,759,999

ROOFING Filed' Aug. l, 1924 Patented May 27, 1930 UNITEDl STATES PATENT OFFICE CHESTER E. RAHR, OF BROOKLINE, MASSACHUSETTS, ASSIGNOR, BY MESNE ASSIGN- MENTS,v T THE PATENT AND LICENSING SETTS, A CORPORATION OF MASSACHUSETTS CORPORATION, 0F BOSTON, MASSACHU- j RooFING l Application led August 1, 1924. Serial No. 729,494.

formed as to present a guide for the laying of the overlapping strip While thev surface underlying the latter strip is so formed as to4 properly take cement for attaching the two strips together so that a Weatherproof jointy may be effected.

For a more complete understanding ofthis invention, reference may be had tcthe accompanying drawings in Which Figure l is a fragmentary plan of a piece of rooiing'showing one manner of forming the joint portion.

Figure 2 is a fragmentary plan showing the manner of overlapping adjacent sheets.

Figure 3 is a cross section on line 3 3 of Figure 2.

For purposes of illustration this invention isrshovvn as applied to slate surfaced roofing in which the sheet material, common! ly formed of fibrous material such as rag felt impregnated and coated with asphalt has a Weather-proofing surfacing of crushed slate applied thereto. According to this invention asphalt is applied to the otherwise completed iooling sheet l along a strip of uniform Width as at 2. This may be positioned centrallyof the width of the sheet as indicated in Figure 1 which may then be cutalong the line centrally of the strip 2 as shown by the dotted line 3, or the strip may be applied along one edge of the sheet only, in either case the finished product presenting a sheet having a strip along one edge coated With asphalt. If the sheet is to be cut, the coating strip is approximately double the Width of that employed Where the coating is applied along the edge of the sheet. This coating'fills the interstices V betvveen the grains of surfacing, as

shown more clearly in Figure 3, so that a plane surface is presented over which the edge of the overlying sheet may proj ect'and which may be properly surfaced to receive cement by which a Weather tight joint between theadjacent sheets may be effected. This surfacing may be of sand or other .comparatively tine granular material, or if desired it may be of talc or mica, this coating serving not only to receive the cement, but also to prevent sticking of the strip portion when the rooting sheet is rolled, as for ease in handling. This coated strip not only furnishes a proper surface for the reception of cement, but also is of different appearance from the main portion of the sheet so as to furnish a guide by 1 which the proper amount of overlap of the succeeding sheet of the roof may be readily determined, the edge of the overlying sheet being laid to the inner edge of the strip.

While as shown this strip of additional coating is applied to rough surfaced rooting,

it might, if desired, be applied to smooth sur v faced roofing, where it Would also function not only as a guide to aid in laying the overlapping sheet but also could be surfaced in a manner to permit a better bond of the cement to be produced than could be had With the smooth surface of the exposed portion of the sheet.

Having thus described certain embodiments of this invention, it should be evident to those skilled in the art that other changes and modifications might be made therein 'Without departing from its spirit or scope as defined by the appended claims.

I claim:

l. Roofing comprising surfaced sheet material having' an additionally coated portion of one face presenting a surface more suitable than the remainder o-f said face to receive cement by which overlapping sheet material may be fixed thereto.

2. Roofing comprising sheet material having a surface suitable for exposure to Weather, a portion of such surface being additionally coated to present a surface more suitable to receive cement by Which overlapping sheet material may be fixed thereto.

3. ,Roofing comprising sheet material having a surface suitable for exposure to the Weather, a portion of said surface in the form of a marginal strip o-f uniform Width being additionally coated to present a surface more suitable to receive cement by which overlapping sheet material may be fixed thereto.

4. Roofing comprising fibrous sheet material impregnated and coated with asphalt and having a Weatherproofing surfacing applied to one'face thereof, a portion of said face being further coated with'asphalt and a surfacing more suitable than the first surfacing. for 3 the application of cement b which overlapping sheet .material may be xed thereto.v

5. Roofing comprising fibrous sheet material impregnated and coated with asphalt and having a Weatherproof surfacing applied to one face' thereof, said sheet having a further coating of asphalt applied thereto in a fmarginal strip of uniform Width, and a surface coating of material more Suitable than the first surfacing to receive cement applied to said strip coating. v f

6. Roofing comprising fibrous sheet material impregnated and coatedwith asphalt and having a Weather-prooi` surfacing of crushed i slate applied to one face, said face having a further coatmg of asphaltapplied to one portion thereofpand a surfacing of fine granular material applied to said portion.

7. Roofing comprising fibrous sheet matel rial impregnated and coated with asphalt and l 2 5 having a weather-proof sufacing of coarse grit applied to one face, said face having'a further coating of asphalt applied to one portion thereof, and a surfacing of fine sand ap- .plied to said portion. v

8. Roofing comprising sheet material having a rough Weather-resistant surface, and having ap liedl to a portion only material filling the mterstices in' the surface and pre- V senting a comparatively smooth surface.

' 9. Roofing comprising sheet material having a rough weather-resistant surface, and having applied along one margin thereof vmaterial iilling th`e interstices in the `surface and presenting a comparatively smooth sur- 40 face flush with the outer points of theremainder of the sheet.

In testimony whereof I have axed my sig- I nature.

Y CHESTER E. RAI-IR.

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